Right is right, even if no one else does it. Juliette G. Low 
Most forms you will need can be found at
https://www.gsnypenn.org/Volunteer/Pages/Forms.aspx.
The following is a list of the most commonly used forms.

Girl Registration Form

To join Girl Scouts, register here

Adult Volunteer Registration Form

Adult form is found here

Girl Trip Permission Form

Troop Leader can have parents fill out here; this is required for all trips/events not taking place at your normal troop meeting place.  The troop leader holds on to these forms.

Troop Activity Request Form

To be filled out by the troop leader for each activity taking place away from normal troop meeting place; fill out at least 2 weeks before the activity for approval.  This is needed for all Council and Service Unit events, as well as troop "field trips."  Application here

Girl/Adult Health History Form

Have each girl fill out her health history form yearly; available here