Cardgate Payment Plugin Not Possible To Install

Store Builder Questions
1

Is anybody using cardgate plugin ? I tried to install it,but somehow I am not able to install it and add as new payment option.I run 4.7.4 version.

2

Is anybody using cardgate plugin ? I tried to install it,but somehow I am not able to install it and add as new payment option.I run 4.7.4 version.

Where did you get installation package?