A lot of times your can use an exacto knife and just cut thru the GSP, I would usually cut 1"sq sections, then slide the knife under the section and lift up, it'll usually come up with minimal damage....Or you can just rip and tear of sections, i've done this as well......GSP is almost imposible to kill, I've torn off sections as small as .25", glued them to a plug and they always recovered and grew.