made the pack completely portable and wrote relevent bat files to go with it

gitportable/usr/share/vim/vim91/syntax/gp.vim

@@ -0,0 +1,88 @@
+" Vim syntax file
+" Language:	gp (version 2.15)
+" Maintainer:	Karim Belabas <Karim.Belabas@math.u-bordeaux.fr>
+" Last change:	2023 Aug 22
+" URL:		http://pari.math.u-bordeaux.fr
+
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
+  finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+" control statements
+syntax keyword gpStatement	break return next
+syntax keyword gpConditional	if iferr
+syntax keyword gpRepeat		until while for forcomposite fordiv
+syntax keyword gpRepeat		fordivfactored foreach forell forfactored
+syntax keyword gpRepeat		forpart forperm forprime forprimestep forqfvec
+syntax keyword gpRepeat		forsquarefree forstep forsubgroup forsubset
+syntax keyword gpRepeat		forvec
+syntax keyword gpRepeat		parfor parforeach parforprime parforprimestep
+syntax keyword gpRepeat		parforvec
+" storage class
+syntax keyword gpScope		my local global export exportall
+" defaults
+syntax keyword gpInterfaceKey	breakloop colors compatible
+syntax keyword gpInterfaceKey	datadir debug debugfiles debugmem
+syntax keyword gpInterfaceKey	echo factor_add_primes factor_proven format
+syntax keyword gpInterfaceKey	graphcolormap graphcolors
+syntax keyword gpInterfaceKey	help histfile histsize
+syntax keyword gpInterfaceKey	lines linewrap log logfile nbthreads
+syntax keyword gpInterfaceKey	new_galois_format output parisize parisizemax
+syntax keyword gpInterfaceKey	path plothsizes prettyprinter primelimit prompt
+syntax keyword gpInterfaceKey	prompt_cont psfile readline realbitprecision
+syntax keyword gpInterfaceKey	realprecision recover secure seriesprecision
+syntax keyword gpInterfaceKey	simplify sopath strictmatch TeXstyle
+syntax keyword gpInterfaceKey	threadsize threadsizemax timer
+
+syntax match gpInterface	"^\s*\\[a-z].*"
+syntax keyword gpInterface	default
+syntax keyword gpInput		read input
+
+" functions
+syntax match gpFunRegion "^\s*[a-zA-Z][_a-zA-Z0-9]*(.*)\s*=\s*[^ \t=]"me=e-1 contains=gpFunction,gpArgs
+syntax match gpFunRegion "^\s*[a-zA-Z][_a-zA-Z0-9]*(.*)\s*=\s*$" contains=gpFunction,gpArgs
+syntax match gpArgs contained "[a-zA-Z][_a-zA-Z0-9]*"
+syntax match gpFunction contained "^\s*[a-zA-Z][_a-zA-Z0-9]*("me=e-1
+
+" String and Character constants
+" Highlight special (backslash'ed) characters differently
+syntax match  gpSpecial contained "\\[ent\\]"
+syntax region gpString  start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=gpSpecial
+
+"comments
+syntax region gpComment	start="/\*"  end="\*/" contains=gpTodo
+syntax match  gpComment "\\\\.*" contains=gpTodo
+syntax keyword gpTodo contained	TODO
+syntax sync ccomment gpComment minlines=10
+
+"catch errors caused by wrong parenthesis
+syntax region gpParen		transparent start='(' end=')' contains=ALLBUT,gpParenError,gpTodo,gpFunction,gpArgs,gpSpecial
+syntax match gpParenError	")"
+syntax match gpInParen contained "[{}]"
+
+hi def link gpConditional	Conditional
+hi def link gpRepeat		Repeat
+hi def link gpError		Error
+hi def link gpParenError	gpError
+hi def link gpInParen		gpError
+hi def link gpStatement		Statement
+hi def link gpString		String
+hi def link gpComment		Comment
+hi def link gpInterface		Type
+hi def link gpInput		Type
+hi def link gpInterfaceKey	Statement
+hi def link gpFunction		Function
+hi def link gpScope		Type
+" contained ones
+hi def link gpSpecial		Special
+hi def link gpTodo		Todo
+hi def link gpArgs		Type
+
+let b:current_syntax = "gp"
+let &cpo = s:cpo_save
+unlet s:cpo_save
+" vim: ts=8