when you say "wikidata is not well suited for lists data", you refer
to wikibase or WDQS here?

Wikibase, per Daniel K.

the data:Bea.gov/GDP by state.tab above is certainly a good
representation for efficient delivery (via json) and display of data.
but inefficient for further data sharing without URIs.

What do you mean by further sharing without uri?

Btw, there is a wikidata property to link to the .map data pages. Not sure about the .tab, but might also work