The Gimlet is classically equal parts gin and lime cordial stirred in the glass it is to be served in, with added ice being optional (but actually optimal)...
I followed the idea of using a little genever (an excellent and deliciously malty idea!) but went for Morgenthaler's KISS recipe of just stirred 2:1 ginever and lime cordial and it's wonderful. It's sour, it's limey, it's sweet, it's herbal, it's incredibly good in its simplicity. I actually think I /prefer/ this over the gin sour. Will have to try Fitzgeralding it with some ango.
If you are disenchanted with the modern Roses but want to be authentic, there are recipes online for making your own lime cordial. They are simple and make a big difference. Lack the pretty green color but su stance over looks.
I also tried as 'Tom Gimet' - subbing Old Tom for London dry, Rutte Old simon, served long in collins glass with ice and a small splash of soda. I'm sure this breaks a lot of rules but I thought it was pretty tasty! I enjoyed the combination of soda water and genever.
I like a regular Gimlet so I made one with 50ml gin, 10ml Bols Zeer Oude jenever and 30ml Rose’s Lime. It’s actually delicious. Just that little bit of maltiness makes a big difference.
For todays version I added 5 drops of Chartreuse Elixir. We found this really an improvement although it changes the "simplicity" of this beautiful cocktail.