Dynamically pass data from static form to GravityForm ??

Hi,

Is there any way to pass along data from a static page/form to a GravityForms form?

Here's what the "form action" code looks like on the static page:

<form action="http://www.website.com/page?sid=1234&appname=JoeBlow" method="get">
<input type="hidden" name="sid" value="1234" />
<input type ="submit" name="contactme" value="more information &raquo;" class="btn es-noprint" />
<input type ="submit" name="contactme" value="book it &raquo;" class="btn es-noprint" />
</form>

Basically, when someone clicks on the contactme Submit button, I want to pass the "appname=JoeBlow" info into a field within the GravityForms form. Specifically, I need "JoeBlow" to be dynamically inserted in a field in a GravityForms form.

Can this be done? If so, how?

Thanks!

Hmm... it's not working.

It DOES work if it's just a regular link, like so:

Contact Us

But NOT if it's in a form (<form action>) as shown in the original post.

Any thoughts?

NEW QUESTION (same topic):

It's not going to be as easy as I'd hoped to get the other form changed to POST instead of GET.

So... is there any way to make GravityForms accept the data from GET instead of POST ?

Thanks.

Hmmm... well, the form code is in my original post. See anything funky in there?

Oh, and again -- the info *DOES* pass correctly if the form is changed to POST, so it can't be *too* odd, right?

I can't figure out what might be wrong with the form while using GET (instead of POST). Oh well.

Kevin, I appreciate your help -- very much. Thanks!