If you complete installation successfully, you must activate and configure module in Addons Module page. You can set fees as fixed price and/or percentage for payment methods.
1- Go to “Addon Modules” page.
WHMCS 8.0
WHMCS 7.x
2- Activate G-Fees Module.
3-Configure G-Fees Module.
1st Arrow : Write whatever text you want the user to appear. WHMCS 8.0
WHMCS 7.x
Then click to save. WHMCS 8.0
WHMCS 7.x
6- Edit Product
7- Activate apply tax.
Thats OK. You will apply fees with (your) selected payment methods.