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Several recent studies have demonstrated that the Galactic bulge hosts twocomponents with different mean metallicities, and possibly different spatialdistribution and kinematics. As a consequence, both the metallicitydistribution and the radial velocity of bulge stars vary across different lineof sights. We present here the metallicity distribution function of red clumpstars in 26 fields spread across a wide area of the bulge, with specialemphasis on fields close to Galactic plane, at latitudes b=-2 and b=-1, thatwere not explored before. This paper includes new metallicities from a sampleof about 5000 K giant stars, observed at spectral resolution R=6500, in theCalcium II Triplet region. They are the main dataset of the GIRAFFE Inner BulgeSurvey. As part of the same survey we have previously published results for asample of about 600 K giant stars, at latitude b=-4 , derived from higherresolution spectra (R=22,500). Results. The combined sample allows us to traceand characterize the metal poor and metal rich bulge populations down to theinner bulge. We present a density map for each of the two components. Contraryto the expectations from previous works, we found the metal poor population tobe more centrally concentrated than the metal rich one, and with a moreaxisymmetric spatial distribution. The metal rich population, on the otherhand, is arranged in a boxy distribution, consistent with an edge-on bar. Bycoupling metallicities and radial velocities we show that the metal poorpopulation has a velocity dispersion that varies rather mildly with latitude.On the contrary, the metal rich population has a low velocity dispersion farfrom the plane (b=-8.5), but it has a steeper gradient with latitude, becominghigher than the metal poor one in the innermost field (b=-1). [abridged]

The GIRAFFE Inner Bulge Survey (GIBS) III. Metallicity distributions and kinematics of 26 Galactic bulge fields