Since you have an RPi, If look into Minera at getminera.org

It's an operating system for the RPi that works really well for a huge number of mining components.  Most liKely.  Minera will run BFGminer or another miner in the background and most likely find all your gpus automatically.

When you say multiple gpus...how many are we talking?

I'm almost certain that cgminer will detect gpus automatically, although if they're different gpus you may need to configure some additional settings.

I do use Raspberry Pi with Minera but I have Gridseed orbs.
You could probably actually download and write an image minera image to a drive and then use Minera on a full size PC by booting directly to the drive instead...but then at that point you might as well buy a RPi and save energy running a PC.  You can get an RPi for about $35 plus another $10-20 for necessary components.

Or, you could look into GUIMiner...You'll want GUIMinerScrypt version, but it essentially puts a user interface over the top of cgminer. Here's a link:  https://guiminer.org/guiminer-scrypt.html
The original GUIMiner was one of the first programs I used to mine Bitcoins before I had a clue as to how cgminer worked, much less the command prompt as a whole. 

I don't see any reason you couldn't run separate instances of cuda and cgminer as long as you specify each program to use separate hardware.

You could even use CPUminer on top of that...

So honestly, the easiest way to get started is to join a mining pool.  Once you join up with a mining pool, they'll provide you with a url on their help page most likely of where to direct the miner.

Then, you'll go to your account on the pool website and create a worker.  The username is your worker username.  Once you create a worker, the site will give you a username to input.  It'll probably be "poolsiteusername.workername" and then lastly a password.

There's a couple good guides on the mining section here.

Hey there and welcome!

Actually, if I might back up a bit, I'm just going to encourage pooled mining for the general betterment of the Goldcoin community.  Depending upon the pool you join, I'm sure you'll still be taking the majority of the share earnings, but by applying that hashing power to a pool you'll help the pool community release blocks more often and thus increase payouts for everyone.  In the long run, you ought to be paid proportional to the amount of hashing power in relationship to the pool anyways.

There's some good pools mentioned over in the Mining Forum but currently I'm using fst.inetrader.com and hashing GLD.  I've had some issues with their rejection/DOA rate but it's at least one option.

Sounds good.  I've got an unusually busy weekend so I'll probably not have time this weekend to research but let me know what you find out as I'll try to pop in for updates.

I don't know of any direct mail chimp integration with SMF, but perhaps another option would be to integrate this SMF forum with a Wordpress bridge and then use the Wordpress integration that exists for Mail Chimp to automate everything...although adding a Wordpress script in the middle is probably overly complicated.  Given the existence of the Mail Chimp API someone with technical abilities exceeding mine could probably directly integrate it, but an smf bridge to WordPress bridge to mail chimp bridge could be a work around.

I have a Mail Chimp account but I haven't used it for a couple f years.  I used to have a website that was pretty subscription heavy and there was a script that used the Mail Chimp API to integrate automatic newsletter creation and add people to organized subscriptions.

Setting up the API was beyond my scope but as far as directly using Mail Chimp, I'd probably have to brush up on my skills a bit, but I'm pretty confident I'd pick it up quick again.

What exactly is the project consisting of? Custom created Newsletters...

Currently the free version has a limited number of newsletters per day or month of something, and Ink ow I used to have to keep on eye on my corn jobs as my site grew to keep it under that limit...so my only concern would be ensuring I'm not the hook for an account exceeding that number and fronting fees.

Welcome!  I'm rather new to the community here and Goldcoin as well, but I'm not new to cryptocurrencies. 
I'd be more than happy to help you continue growing your wallet, but I'd be curious to here on where you're looking to expand.

If you're looking for easier ways to purchase altcoins, such as Goldcoin, I really recommend Cryptsy.  Here's a link:
https://www.cryptsy.com/users/register?refid=315291

I find that exchange to have the widest assortment of coins to trade in and although the verification process is sort of time consuming, it makes it easy to purchase a variety of currency using money from a bank account.

If you're looking to mine coins, which is a hobby I'm just starting to get back into, you're probably going to have a bit more research to do, but I'd be happy to help you out if that's a direction you're looking to go.