I am non tax resident in Uk and receive my savings interest gross. Can I also receive share dividends from uk companies gross

No. However that should change soon following proposals in the last budget.

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Gordon Brown (in his first budget) really consigned the concept of " gross" and "net" to history as far as company dividends are concerned.

This is a slightly complex area but, in general, as a non resident you are not liable to any UK tax on any UK sourced dividend income. For UK residents there was a significant change flagged in the last budget and due to come into effect next year ie the introduction of a new 7.5% rate for dividend income above 5000 pounds. The situation for non residents however,remains the same, for now at least.

No. However that should change soon following proposals in the last budget.

As Worldchild explained, the only possible change would be for the worse though personally I'm not expecting any change for non-residents.

Everyone should just forget about the dividend tax withheld at source as no one can reclaim it.