Adding a Gem to a profile

I'm trying to utilize a call to the AWS RAM api in one of my controls. This gem is not installed in the aws-inspec profile, and I'm unsure of how to add it to my profile. In the aws-inspec repo they just have a Gemfile with the sdk's in the root of the profile. When I do the same I get nothing. I'm not super deep into ruby, so forgive me if this is more of a Ruby question than an Inspec one.