Currently GeoCAT is including data GBIF have marked as "geospatially suspicious" which makes GBIF mediated data look poor. Try Puma concolor which shows records in the sea off Argentina, which GBIF maps will not.

Please update this line as it is incorrectly using the GBIF API:
https://github.com/Vizzuality/GeoCAT/blob/master/app/controllers/gbif_controller.rb#L14

There are 2 issues:

1. isGeoreferenced=true should be hasCoordinate=true
2. coordinateissues=false should be hasGeospatialIssue=false

Here is a working example.
http://api.gbif.org/v1/occurrence/search?hasCoordinate=true&format=darwin&limit=3&hasGeospatialIssue=false&scientificName=Puma%20concolor

Links from GeoCAT help page broken due to Kew website refresh. Help files are now here: https://www.kew.org/science/collections-and-resources/data-and-digital/tools

The GBIF index holds data covering >100 years.
When you query the GBIF index you don't include a year filter, and you only page 3 times (of 300 results each). I'd suggest considering adding a &year>1980 or similar to the filter to get the latest data.

I'd also suggest considering something like 10 pages of 250 records by using &limit=250
or more pages. 900 is both somewhat bizarre and quite low - ideally the user should be able to increase to a very large amount.

When occurrence data is retrieved from GBIF, please add datasetKey as a field available to the user in downloads. This will allow the user to identify the parent datasets and cite the data according to our citation guidelines.