How To Add Servers To mIRC and Utilize Perform
1) Click on Tools > Options (or you can hit alt+o)

2) Then proceed to "Servers" under connect and click on "Add"

3) A window should appear and type in the following information:

4) Proceed to Connect > Options > Perform

5) Click "Add"

6) Scroll down to "GlobalGamers" and hit Ok.

7) Insert the information according to the image below
(*Note: Replace user & pass with your own NickServ user & pass
Replace channel1, channel2, channel3... with the other channels you want to join on connect)
Before you click ok, make sure to check the box that says "Enable perform on connect"

8) Then click all the Ok's when you're done.
9) Type in any GlobalGamers window if you haven't already done so:
/ns set autohide on
10) Quit mirc altogether and test it to see if you're successful.