This has NOTHINIG WHATSOEVER to do with “linking the Gh file to the rhino file”.
There are many possible reasons you aren’t seeing the GH output.
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Have you enabled Preview on the component(s) you want to see?
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Have you tried the ‘Zoom on Preview’ feature?
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What render mode are you using?
Can you post your GH file?
3. Attach minimal versions of all the relevant files