Use GDXInterface

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "test/CACE-D-21-01061"]
 	path = test/GAMS/input/CACE-D-21-01061
 	url = git@github.com:omega-icl/CACE-D-21-01061.git
+[submodule "test/GAMS/input/gamsworld"]
+	path = test/GAMS/input/gamsworld
+	url = git@github.com:GAMS-dev/gamsworld.git

Project.toml

@@ -5,12 +5,17 @@ version = "0.1.0"
 
 [deps]
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
+GDXInterface = "b8352055-3412-4df1-864e-ee7edae71aec"
 JuMP = "4076af6c-e467-56ae-b986-b466b2749572"
 MathOptInterface = "b8f27783-ece8-5eb3-8dc8-9495eed66fee"
 OrderedCollections = "bac558e1-5e72-5ebc-8fee-abe8a469f55d"
 
+[sources]
+GDXInterface = {url = "https://github.com/jd-foster/GDXInterface.jl"}
+
 [compat]
-DataFrames = "1.7"
+DataFrames = "1"
+GDXInterface = "0.1"
 JuMP = "1.29.3"
 MathOptInterface = "1.48.0"
 OrderedCollections = "1.7"

src/AMPL/model.jl

@@ -4,7 +4,7 @@ function parse_axe(s::AbstractString)
         return JuMPConverter.Axe(nothing, s)
     else
         @assert sp[2] == "in"
-        return JuMPConverter.Axe(sp[1], sp[3])
+        return JuMPConverter.Axe(sp[1], replace(sp[3], ".." => ":"))
     end
 end