What is the difference between GDP and GMP?

Good manfacturing practice 

GDP stands for Good Distribution Practice , as per WHO TRS 961 and orange book

GMP stands for Good Manufacturing practice

GDP is part of GMP ,

Some times GDP is used as an abbreviation for Good Documentation practice which is also part form GMP

GDP means good distribution practice which covers the Pharmaceutical products distribution from manufacturer till end user as per applicable local and international regulations

GMP means good manufacturing practice which covers all aspects of manufacturing of pharmaceutical products from raw materials till fished product.

The main difference between this two terms of use is GDP explaining the distributing of medicines while GMP is talking about there manufacturing way in pharmaceuticals.  

GDP Stand for "Good documentation practice". This is a term in the pharmaceutical industry to describe standards by which documents are created and maintained.While though GMP Stand for "Good Manufacturing Practice". Empowered by the Food and Drug Act, the FDA created the Good Manufacturing Practice Regulations (GMP). Because they continually change and ratchet up the requirements, the pharmaceutical industry has chosen to use the abbreviation cGMP which stands for current Good Manufacturing Practice

The European Union’s guidelines on Good Distribution Practice (GDP) were updated at the end of 2013.  The following covers an overview of the main differences between GDP and Good Manufacturing Practice (GMP).

The obvious difference between GDP and GMP is that GDP covers the wholesale distribution of medicines, whereas GMP covers their manufacture.

There is overlap between the two – to maintain product quality after a batch has been released from the manufacturing site, as well as to monitor and control complaints, problems and to permit a recall.

It may initially appear that GDP is smaller and less detailed than GMP, but this is not the case. If you compare the amount of coverage that GMP gives to its warehouse related activities then there is much less detail in GMP than can be found in GDP.

GDP is a part of GMP, and the Good Documentation practice specializes in everything in related documentation in the production, and to get a good documentation and free of mistakes in the plant , and to document all work done in the plant.