You can find a deb for Gramps 3.0.1 that works with Elyssa here Theo:http://www.getdeb.net/release/2722
I say it works as I just installed it....seems to be working fine..
Once you get the deb downloaded, just right click on it, select "Open with GDebi Package Installer" and you should be good to go.
p.s. Would you do me a favor and post a request to add Gramps to the Linux Mint software portal? Ed is doing a great job of adding in apps people request (470+ as of now!) Gramps should be an easy one for him. Here's the link to Ed's post asking for apps to add:http://linuxmint.com/forum/viewtopic.ph ... &sk=t&sd=a
Just give him the Gramps home page link and hopefully he will be able to build us a .mint file for Gramps.