Jeppesen has made several different Skybound programmers over the years. I purchased one used from VAF years ago that works with the old PCMCIA cards. A large number of years back, the database became too large for the cards that shipped with the GX60 and a new 4-Mb card was required. The cheap way to buy the 4-Mb PCMCIA data card was off the internet. I picked up about a dozen cards. I no longer have a Jeppesen subscription for my GX60 as the need (and desire) for IFR flying is not there. I do have a year or two old database on a datacard but just like the programmer, have not got around to unpacking following the move.
I think the GX60 is a great navigator and you will enjoy using it. Mine is around 15-years old. Yes there are better ones available now but the one I have does everything I want, why spend money on an upgrade that I can put into fuel to fly more.
This is the image of what is needed to program the GX60 datacard.