The following applies to the english-language version of FA-124.

1) To open a G1M file in fa-124:

* Look at the right-hand window where it says:
Computer
+Default

* Use right-mouse button to click on Default

* Select 'Import fx-9860 file' from the pop-up menu

2) To create G1M files:

* Using left-mouse button, click on Default

* Go back up to the main menu at the top of FA-124

* Select 'Item', then 'New'

* Enter a name 

* a program will appear in the right-hand window
(to view it, you may need to click the '+' symbol to expand the contents of Default)

* Right-click on the program and select 'Export to fx-9860 file'