Join Bad Performance on different data types

Hi,

Today i need to change datatype of one of my tables from *bigint to
bigint[] *due to
application requirements. But One of my query hangs after this change :-

select DISTINCT glt.id || ':' || gtt.name as id_type, glt.name, latitude,
longitude, radius, latitude || ',' || longitude as latlon from graph1 glt,
graph2 gcr, graph3 gtd, graph5 td, graph6 gtt where gtt.id=td.entity_type_id
AND glt.id=ANY(gtd.id_list) and *gtd.id <http://gtd.id> = gcr.t_ids*) AND
gcr.id=ANY(td.detail_id);

*Explain Analyze Expected time : Total runtime: 19460.809 ms*

select DISTINCT glt.id || ':' || gtt.name as id_type, glt.name, latitude,
longitude, radius, latitude || ',' || longitude as latlon from graph1 glt,
graph2 gcr, graph3 gtd, graph5 td, graph6 gtt where gtt.id=td.entity_type_id
AND glt.id=ANY(gtd.id_list) and *gtd.id <http://gtd.id> = ANY(gcr.t_ids)*AND
gcr.id=ANY(td.detail_id);

Query not finishing from last 1 hour. Tables size are ~ 5k rows and fairly
small tables.

I tried creating simple and gin indexes on the column(t_ids) but still not
helping. Anyone has any idea or faced this before. Postgresql version is
9.2.

Thanks