Setting up Citrix Remote Access

I am very new to Citrix, but I have recently been employed by a company who has a Citrix farm in place. Unfortunately, the gentlemen who brought the farm in, is no longer with the company.

I would like to publish some applications to be accessed via the internet.

I do not know how to accomplish this. If someone could point me to some sites or articles that would help me out that would be wonderful.

Just a note there is a Citrix Access Gateway already in place (I am not sure if it is configured or setup). How do I find out whether or not this is running correctly?

Any and all help welcome.

Thank you!