What is the Value from the SKU Field? There are almost 50 fields stored in the SKU..
You can just add the field name as a macro:
/{%DocumentCulture%}/Product/{%NodeGUID%}/{%NodeAlias%}?id={%SKUID%}&otherprops={%SKUNAME%}-{%SKUPrice%}-{%SKUNumber%}-{%SKUDescription%}
results in:
en-US/Product/8263f6cc-79b7-40ac-8042-92eb8580cef6/test?id=130&otherprops=test-12.340000000-abc456-desc