If you are using files from the Gerbode website then you can download a midi file of each piece and import that into MuseScore. The result will need a lot of editing, as the program Sarge Gerbode uses for digitising tablature (Fronimo) exports everything as a single voice, but it's much quicker than transcribing the tablature bar by bar. However for pieces where only the only available written source is the lute tablature I find myself most comfortable using a program that has an onscreen fretboard (in my case Sibelius). Sibelius allows you to create an instrument with the required tuning (renaissance or baroque lute for example) and reproduce the layout of the tablature on screen which can then be transferred to a notation staff. This, again, needs editing to separate the voices and you need to judge how the voicing works in each piece as the lute tablature does not convey this information.
The drawback of using Sibelius is that it does not have a good way of representing the courses below the 6th, so you have to add these notes in later. MuseScore is much better in this respect (I find its implementation of lute tablature very good) and I hope that the developers will eventually implement an onscreen fretboard (there is already an onscreen keyboard).
An alternative could be to get hold of a midi guitar and 'play' the tablature into a scoring program. I tried this a few years back and didn't get on with it at all but I believe some people find it ok.
Music recognition programs that 'listen' to the music playing and convert it to a score are mostly very poor with polyphonic music, but if you have a copy of a piece in notation - say you want to make a guitar arrangement of a keyboard piece - then optical music recognition programs are not bad, especially with clearly printed scores. I currently use SmartScore Music-to-XML which, as its name suggests, converts a written score to Music XML, which most music scoring programs can import (it will also convert to either Sibelius or Finale). There have been experiments with scanning and digitising lute tablature directly but I don't think these have progressed very far - that would be the ideal method if it worked!
Eric from GuitarLoot
Renaissance and Baroque freak; classical guitars by Lester Backshall (2008), Ramirez (Guitarra del Tiempo 2017),
Yamaha (SLG 130NW silent classical guitar 2014).